Endoscopic Techniques for Resection of Large Esophageal Polyps

Large oesophageal polyps are uncommon, but their size, mobility and attachment can make removal technically demanding. A lesion that appears benign may cause dysphagia, regurgitation, bleeding or airway symptoms, while its stalk can conceal important feeding vessels. Careful imaging, endoscopic planning and access to surgical backup are central to safe management.

For clinicians in Australia, decisions often involve coordination between public hospitals, private endoscopy units and tertiary referral services. The scientific discussions and practical education associated with the International Society for Diseases of the Esophagus remain useful for teams reviewing complex upper gastrointestinal cases, including techniques for submucosal resection, specimen retrieval and complication management.

Assessing the lesion before resection

High-definition endoscopy should define the polyp’s surface, colour, ulceration, vascularity and point of attachment. A long, pedunculated lesion may arise from the cervical or mid-oesophagus, whereas a broad-based or subepithelial mass requires a different risk assessment. Biopsy can be unhelpful or hazardous when the lesion is highly vascular, and superficial samples may not represent the deeper pathology.

Contrast-enhanced CT is useful for assessing size, extension and relationships with the airway or mediastinal structures. Endoscopic ultrasound can help distinguish mucosal, submucosal and muscular involvement, although very large mobile polyps may be difficult to examine in their entirety. If motility symptoms raise concern for an underlying disorder, clinicians may also review this manometry interpretation guide when considering the broader clinical picture.

Choosing between endoscopic and surgical treatment

Endoscopic resection is generally attractive when the lesion is pedunculated, intraluminal and accessible, particularly when its base can be clearly identified. Snare polypectomy, endoscopic mucosal resection and endoscopic submucosal dissection each have a role. The choice depends on stalk thickness, tissue layer, suspected histology, local expertise and the ability to control bleeding.

Surgery may be safer for a broad-based lesion, suspected malignancy, deep invasion or a polyp that cannot be retrieved through the mouth without trauma. In Australia, a case discussed through a metropolitan upper gastrointestinal multidisciplinary team may involve a gastroenterologist, upper GI surgeon, radiologist, pathologist and anaesthetist before the procedure is booked.

Preparing for a large pedunculated polyp

The endoscopist should establish whether the polyp can be withdrawn through the mouth and whether its stalk can be approached in a stable position. A large cap, overtube or careful use of a transparent distal attachment may improve visualisation and protect the airway during withdrawal. The team should also anticipate the possibility that the lesion will obstruct the oesophageal lumen or obscure the field after partial transection.

Large polyps can contain substantial blood flow, so injection, mechanical clips, detachable loops or endoscopic coagulation devices may be prepared in advance. Anaesthetic planning matters when the lesion is near the hypopharynx or could prolapse towards the larynx. This is particularly relevant in busy Sydney, Melbourne or Brisbane referral centres where complex cases may involve shared lists and limited access to emergency theatre time.

Snare resection and bleeding control

For a well-defined stalk, a detachable snare can be placed close to the base before transection. A second snare or clip may provide additional control, while a blended electrosurgical current can divide the stalk and reduce bleeding. The operator should avoid cutting too close to the oesophageal wall if the attachment is broad or the depth is uncertain.

If brisk bleeding occurs, the immediate priorities are maintaining the view, stabilising the patient and securing the vessel. Endoscopic clips, injection therapy and thermal devices can be used according to the anatomy and equipment available. A large specimen should be removed gently, with attention to airway protection and the risk of mucosal abrasion during extraction.

Advanced mucosal and submucosal techniques

Endoscopic mucosal resection may suit a superficial lesion or a smaller broad-based component, but piecemeal removal can compromise pathological assessment. Endoscopic submucosal dissection permits en bloc removal in selected cases and may provide clearer margins, though it demands advanced skill and carries risks of perforation and delayed bleeding.

Submucosal tunnelling or endoscopic full-thickness approaches are highly specialised options and should be reserved for carefully selected lesions in experienced units. Training, proctoring and access to carbon dioxide insufflation, haemostatic tools and reliable rescue pathways are essential. Rural patients from regional New South Wales, Queensland or Western Australia may need planned transfer to a tertiary centre rather than fragmented treatment across several hospitals.

Pathology and post-procedure surveillance

The specimen should be oriented where possible and sent with precise details about the attachment site, resection method and clinical impression. Pathology may identify fibrovascular polyps, inflammatory lesions, granular cell tumours, squamous neoplasia or other uncommon entities. A definitive diagnosis determines whether endoscopic treatment was adequate.

After resection, patients need observation for chest pain, fever, tachycardia, dysphagia, bleeding and signs of perforation. The timing of oral intake depends on the depth and size of the resection and the operator’s assessment. Follow-up endoscopy may be required for a residual base, recurrence or a lesion with dysplasia or uncertain margins.

Practical recommendations for Australian units

• Confirm the attachment, depth and likely histology before selecting a technique.
• Discuss large or unusual lesions at an upper gastrointestinal multidisciplinary meeting.
• Prepare mechanical and thermal haemostasis equipment before starting resection.
• Consider an overtube, cap and airway strategy for mobile or very large polyps.
• Arrange surgical and interventional radiology support when bleeding or perforation risk is significant.
• Give regional patients a clear plan for travel, observation and urgent review after discharge.

Building a safe resection pathway

A consistent pathway reduces avoidable delays: review imaging, confirm consent, check anticoagulant management, brief the anaesthetic team and document the rescue plan. Patients should understand that an apparently straightforward polyp may require staged treatment or surgery if the base is unsafe to remove endoscopically.

Australian services can also use congress resources, local credentialling frameworks and case review to standardise advanced endoscopy practice. The next practical step is to present the next large oesophageal polyp at a multidisciplinary meeting with its endoscopic images, cross-sectional imaging and proposed haemostasis plan.